CA2287773C - Outil a rmn pour fond de puits comportant un sequenceur d'impulsions programmable - Google Patents

Outil a rmn pour fond de puits comportant un sequenceur d'impulsions programmable Download PDF

Info

Publication number
CA2287773C
CA2287773C CA002287773A CA2287773A CA2287773C CA 2287773 C CA2287773 C CA 2287773C CA 002287773 A CA002287773 A CA 002287773A CA 2287773 A CA2287773 A CA 2287773A CA 2287773 C CA2287773 C CA 2287773C
Authority
CA
Canada
Prior art keywords
state
nmr measurement
tool
measurement sequence
nmr
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA002287773A
Other languages
English (en)
Other versions
CA2287773A1 (fr
Inventor
Ali K. Toufaily
Abdurrahman Sezginer
Bruno Jorion
Luis E. Depavia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schlumberger Canada Ltd
Original Assignee
Schlumberger Canada Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/368,341 external-priority patent/US6255818B1/en
Application filed by Schlumberger Canada Ltd filed Critical Schlumberger Canada Ltd
Publication of CA2287773A1 publication Critical patent/CA2287773A1/fr
Application granted granted Critical
Publication of CA2287773C publication Critical patent/CA2287773C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00Arrangements or instruments for measuring magnetic variables
    • G01R33/20Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/3808Magnet assemblies for single-sided MR wherein the magnet assembly is located on one side of a subject only; Magnet assemblies for inside-out MR, e.g. for MR in a borehole or in a blood vessel, or magnet assemblies for fringe-field MR
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N24/00Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
    • G01N24/08Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
    • G01N24/081Making measurements of geologic samples, e.g. measurements of moisture, pH, porosity, permeability, tortuosity or viscosity
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00Arrangements or instruments for measuring magnetic variables
    • G01R33/20Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/32Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/34Constructional details, e.g. resonators, specially adapted to MR
    • G01R33/34007Manufacture of RF coils, e.g. using printed circuit board technology; additional hardware for providing mechanical support to the RF coil assembly or to part thereof, e.g. a support for moving the coil assembly relative to the remainder of the MR system
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00Arrangements or instruments for measuring magnetic variables
    • G01R33/20Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/32Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/34Constructional details, e.g. resonators, specially adapted to MR
    • G01R33/34046Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
    • G01R33/34053Solenoid coils; Toroidal coils
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00Arrangements or instruments for measuring magnetic variables
    • G01R33/20Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/32Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/34Constructional details, e.g. resonators, specially adapted to MR
    • G01R33/341Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00Arrangements or instruments for measuring magnetic variables
    • G01R33/20Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/32Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/36Electrical details, e.g. matching or coupling of the coil to the receiver
    • G01R33/3678Electrical details, e.g. matching or coupling of the coil to the receiver involving quadrature drive or detection, e.g. a circularly polarized RF magnetic field
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00Arrangements or instruments for measuring magnetic variables
    • G01R33/20Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/383Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using permanent magnets
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00Arrangements or instruments for measuring magnetic variables
    • G01R33/20Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/387Compensation of inhomogeneities
    • G01R33/3873Compensation of inhomogeneities using ferromagnetic bodies ; Passive shimming
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00Arrangements or instruments for measuring magnetic variables
    • G01R33/20Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48NMR imaging systems
    • G01R33/54Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
    • G01R33/546Interface between the MR system and the user, e.g. for controlling the operation of the MR system or for the design of pulse sequences
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/18Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
    • G01V3/32Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with electron or nuclear magnetic resonance

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Health & Medical Sciences (AREA)
  • Remote Sensing (AREA)
  • Biochemistry (AREA)
  • Vascular Medicine (AREA)
  • Signal Processing (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Geophysics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Drilling And Boring (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Electrotherapy Devices (AREA)
CA002287773A 1998-11-05 1999-11-01 Outil a rmn pour fond de puits comportant un sequenceur d'impulsions programmable Expired - Fee Related CA2287773C (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US10718498P 1998-11-05 1998-11-05
US60/107,184 1998-11-05
US09/368,341 1999-08-04
US09/368,341 US6255818B1 (en) 1998-08-18 1999-08-04 Method and apparatus for performing magnetic resonance measurements
US09/427,370 US6400147B1 (en) 1998-11-05 1999-10-26 Downhole NMR tool having a programmable pulse sequencer
US09/427,370 1999-10-26

Publications (2)

Publication Number Publication Date
CA2287773A1 CA2287773A1 (fr) 2000-05-05
CA2287773C true CA2287773C (fr) 2007-01-02

Family

ID=27380268

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002287773A Expired - Fee Related CA2287773C (fr) 1998-11-05 1999-11-01 Outil a rmn pour fond de puits comportant un sequenceur d'impulsions programmable

Country Status (8)

Country Link
US (3) US6400147B1 (fr)
CN (3) CN1245640C (fr)
AR (1) AR021095A1 (fr)
CA (1) CA2287773C (fr)
GB (1) GB2346448B (fr)
IT (1) IT1314010B1 (fr)
NL (1) NL1013496C2 (fr)
NO (1) NO326626B1 (fr)

Families Citing this family (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6727696B2 (en) * 1998-03-06 2004-04-27 Baker Hughes Incorporated Downhole NMR processing
US7020868B2 (en) * 2000-11-22 2006-03-28 General Electric Company Graphic application development system for a medical imaging system
US6859032B2 (en) * 2001-12-18 2005-02-22 Schlumberger Technology Corporation Method for determining molecular properties of hydrocarbon mixtures from NMR data
US6838875B2 (en) * 2002-05-10 2005-01-04 Schlumberger Technology Corporation Processing NMR data in the presence of coherent ringing
US6765380B2 (en) 2002-05-23 2004-07-20 Schlumberger Technology Corporation Determining wettability of an oil reservoir using borehole NMR measurements
US6867589B2 (en) * 2002-08-09 2005-03-15 Schlumberger Technology Corporation Method for detecting hydrocarbons from NMR data
US6703832B2 (en) * 2002-08-12 2004-03-09 Schlumberger Technology Corporation Method for detecting hydrocarbons by comparing NMR response at different depths of investigation
US6859033B2 (en) * 2002-08-28 2005-02-22 Schlumberger Technology Corporation Method for magnetic resonance fluid characterization
US6781371B2 (en) * 2002-09-06 2004-08-24 Schlumberger Technology Corporation High vertical resolution antennas for NMR logging
GB2408580B (en) * 2002-09-06 2006-03-15 Schlumberger Holdings NMR well logging
US6586932B1 (en) 2002-10-16 2003-07-01 Schlumberger Technology Corporation Enhanced performance antennas for NMR logging
US6960913B2 (en) * 2003-01-14 2005-11-01 Schlumberger Technology Corporation Multi-measurement NMR analysis based on maximum entropy
US7034528B2 (en) * 2003-02-27 2006-04-25 Schlumberger Technology Corporation Methods for formation evaluation based on multi-dimensional representation of nuclear magnetic resonance data
US7164266B2 (en) * 2003-03-07 2007-01-16 Precision Energy Services, Inc. Nuclear magnetic resonance tool with conductive and non-conductive magnet assembly
US20040260199A1 (en) * 2003-06-19 2004-12-23 Wilson-Cook Medical, Inc. Cytology collection device
US7053614B2 (en) * 2004-04-08 2006-05-30 Varian, Inc. Optimized channel controller for NMR apparatus
US7667462B2 (en) * 2006-12-22 2010-02-23 Schlumberger Technology Corporation Nuclear magnetic resonance module
CN102360703B (zh) * 2011-10-12 2013-03-27 上海神开石油化工装备股份有限公司 一种石油井下核磁共振随钻测井仪的磁体结构
MX346802B (es) 2012-02-08 2017-03-31 Halliburton Energy Services Inc Herramienta de registro de resonancia magnética nuclear que tiene múltiples magnetómetros atómicos montados en almohadillas.
CA2886775A1 (fr) 2012-10-04 2014-04-10 Halliburton Energy Services, Inc. Appareil, procedes, et systemes de localisation par la frequence
DE102013213591B4 (de) 2013-07-11 2015-02-12 Siemens Aktiengesellschaft Ermittlung einer B0-Feldkarte mittels Anregungen mit unterschiedlichen Anregungsfeldern
US10295636B2 (en) * 2013-10-28 2019-05-21 Schlumberger Technology Corporation Integrated circuit for NMR systems
MX2016014683A (es) * 2014-06-09 2017-03-06 Halliburton Energy Services Inc Sistemas y metodos de resonancia magnetica que emplean secuencias de pulsos de multiples formas para mediciones paralelas.
WO2016033344A1 (fr) * 2014-08-27 2016-03-03 Schlumberger Canada Limited Circuit intégré spécifique (asic) pour résonance magnétique nucléaire (rmn)
EP3268579B1 (fr) 2015-03-11 2024-06-12 Halliburton Energy Services, Inc. Capteur à résonance magnétique nucléaire de fond de trou utilisant un matériau magnétique anisotrope
WO2017052787A1 (fr) 2015-09-24 2017-03-30 Weatherford Technology Holdings, Inc. Outil de diagraphie rmn à balayage latéral
BR112018009697A8 (pt) * 2015-12-17 2019-02-26 Halliburton Energy Services Inc ferramenta de perfilagem de ressonância magnética nuclear, sistema e método de teste
BR112019001717B1 (pt) 2016-08-08 2022-09-06 Halliburton Energy Services Inc Dispositivo de caracterização subterrânea e amostragem de fluidos, e, método de caracterização subterrânea
US10739490B2 (en) 2016-08-08 2020-08-11 Halliburton Energy Services, Inc. Dual zone nuclear magnetic resonance sensing device for subterranean characterization
BR112019005012A2 (pt) * 2016-09-28 2019-06-04 Halliburton Energy Services Inc dispositivo de ressonância magnética nuclear, e, método de caracterização de uma formação subterrânea
US10732238B2 (en) * 2016-12-02 2020-08-04 Halliburton Energy Services, Inc. Determining frequency for achieving a high signal-to-noise ratio in low impedance receivers
CN108267790B (zh) * 2018-01-17 2020-07-17 中国石油大学(北京) 三维扫描核磁共振成像仪阵列天线驱动方法及装置
CN108519624A (zh) 2018-03-08 2018-09-11 中国石油大学(北京) 井下三维扫描核磁共振成像仪器射频天线接收方法及装置
CN108663972B (zh) * 2018-05-23 2020-07-17 中国石油大学(北京) 随钻核磁共振测井仪器主控系统与装置
CN108828480A (zh) * 2018-06-05 2018-11-16 中国石油大学(北京) 三维核磁共振成像仪阵列天线去耦方法与装置
JP2022514025A (ja) 2018-12-18 2022-02-09 サウジ アラビアン オイル カンパニー 同軸共振器を用いたガスキック検出のためのダウンホールツール
US10865640B2 (en) 2019-04-10 2020-12-15 Saudi Arabian Oil Company Downhole tool with CATR
US10895659B2 (en) 2019-04-18 2021-01-19 Halliburton Energy Services, Inc. Detecting nuclear magnetic resonance logging tool motion
US11332991B2 (en) 2019-07-17 2022-05-17 Saudi Arabian Oil Company Targeted downhole delivery with container
US11366071B2 (en) 2020-03-04 2022-06-21 Saudi Arabian Oil Company Performing microwave measurements on samples under confining pressure using coaxial resonators
US11268380B2 (en) 2020-04-22 2022-03-08 Saudi Arabian Oil Company Kick detection using logging while drilling
US11414984B2 (en) 2020-05-28 2022-08-16 Saudi Arabian Oil Company Measuring wellbore cross-sections using downhole caliper tools
US11414985B2 (en) 2020-05-28 2022-08-16 Saudi Arabian Oil Company Measuring wellbore cross-sections using downhole caliper tools
US11631884B2 (en) 2020-06-02 2023-04-18 Saudi Arabian Oil Company Electrolyte structure for a high-temperature, high-pressure lithium battery
US11391104B2 (en) 2020-06-03 2022-07-19 Saudi Arabian Oil Company Freeing a stuck pipe from a wellbore
US11149510B1 (en) 2020-06-03 2021-10-19 Saudi Arabian Oil Company Freeing a stuck pipe from a wellbore
US11719089B2 (en) 2020-07-15 2023-08-08 Saudi Arabian Oil Company Analysis of drilling slurry solids by image processing
US11255130B2 (en) 2020-07-22 2022-02-22 Saudi Arabian Oil Company Sensing drill bit wear under downhole conditions
US11506044B2 (en) 2020-07-23 2022-11-22 Saudi Arabian Oil Company Automatic analysis of drill string dynamics
US11867008B2 (en) 2020-11-05 2024-01-09 Saudi Arabian Oil Company System and methods for the measurement of drilling mud flow in real-time
US11434714B2 (en) 2021-01-04 2022-09-06 Saudi Arabian Oil Company Adjustable seal for sealing a fluid flow at a wellhead
US11697991B2 (en) 2021-01-13 2023-07-11 Saudi Arabian Oil Company Rig sensor testing and calibration
US11572752B2 (en) 2021-02-24 2023-02-07 Saudi Arabian Oil Company Downhole cable deployment
US11727555B2 (en) 2021-02-25 2023-08-15 Saudi Arabian Oil Company Rig power system efficiency optimization through image processing
US11846151B2 (en) 2021-03-09 2023-12-19 Saudi Arabian Oil Company Repairing a cased wellbore
US11879328B2 (en) 2021-08-05 2024-01-23 Saudi Arabian Oil Company Semi-permanent downhole sensor tool
US11624265B1 (en) 2021-11-12 2023-04-11 Saudi Arabian Oil Company Cutting pipes in wellbores using downhole autonomous jet cutting tools
US11867012B2 (en) 2021-12-06 2024-01-09 Saudi Arabian Oil Company Gauge cutter and sampler apparatus
US11867049B1 (en) 2022-07-19 2024-01-09 Saudi Arabian Oil Company Downhole logging tool
US11913329B1 (en) 2022-09-21 2024-02-27 Saudi Arabian Oil Company Untethered logging devices and related methods of logging a wellbore
US12203366B2 (en) 2023-05-02 2025-01-21 Saudi Arabian Oil Company Collecting samples from wellbores
US12486762B2 (en) 2024-01-11 2025-12-02 Saudi Arabian Oil Company Systems and methods for untethered wellbore investigation using modular autonomous device

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3597681A (en) 1957-01-30 1971-08-03 Chevron Res Nuclear magnetic well logging
US4175251A (en) * 1978-04-20 1979-11-20 Schlumberger Technology Corporation Nuclear magnetism logging method and system
JPS61745A (ja) 1984-06-13 1986-01-06 Toshiba Corp 核磁気共鳴装置
US4719423A (en) 1985-08-13 1988-01-12 Shell Oil Company NMR imaging of materials for transport properties
JPS62176442A (ja) 1986-01-29 1987-08-03 横河メディカルシステム株式会社 核磁気共鳴断層撮影装置用スキヤンコントロ−ラ
US4710713A (en) 1986-03-11 1987-12-01 Numar Corporation Nuclear magnetic resonance sensing apparatus and techniques
DE3920997C1 (fr) 1989-06-27 1990-08-23 Bruker Analytische Messtechnik Gmbh, 7512 Rheinstetten, De
US5291610A (en) 1990-07-12 1994-03-01 The Regents Of The University Of California Microcode sequencer changing states in response to an external gating input level change upon the occurrence of a WAIT instruction
US5212447A (en) 1990-12-03 1993-05-18 Numar Corporation Apparatus and technique for nmr diffusion measurement
JP3396490B2 (ja) 1992-03-31 2003-04-14 株式会社東芝 磁気共鳴映像装置
US5309102A (en) * 1993-05-07 1994-05-03 General Electric Company Frequency calibration for MRI scanner
US5451873A (en) * 1993-10-05 1995-09-19 Schlumberger Technology Corporation Method and apparatus for determining the in situ larmor frequency of a wellbore NMR tool to compensate for accumulation of magnetic material on the magnet housing of the tool
US5517115A (en) * 1993-12-16 1996-05-14 Numar Corporation Efficient processing of NMR echo trains
US5680043A (en) 1995-03-23 1997-10-21 Schlumberger Technology Corporation Nuclear magnetic resonance technique for determining gas effect with borehole logging tools
US6242912B1 (en) * 1995-10-12 2001-06-05 Numar Corporation System and method for lithology-independent gas detection using multifrequency gradient NMR logging
US5712566A (en) * 1996-02-23 1998-01-27 Western Atlas International, Inc. Nuclear magnetic resonance apparatus and method
US5767674A (en) * 1996-04-17 1998-06-16 Griffin; Douglas D. Apparatus for protecting a magnetic resonance antenna
US5912558A (en) * 1997-11-14 1999-06-15 Picker International, Inc. Automatic frequency tuning for MR scanners
US6140817A (en) * 1998-05-26 2000-10-31 Schlumberger Technology Corporation Magnetic resonance well logging method and apparatus
US6348792B1 (en) * 2000-07-27 2002-02-19 Baker Hughes Incorporated Side-looking NMR probe for oil well logging

Also Published As

Publication number Publication date
NL1013496C2 (nl) 2000-07-06
GB2346448A (en) 2000-08-09
NO326626B1 (no) 2009-01-19
US6573716B2 (en) 2003-06-03
US6534980B2 (en) 2003-03-18
NO995395L (no) 2000-05-08
IT1314010B1 (it) 2002-12-03
GB9926054D0 (en) 2000-01-12
US20020033699A1 (en) 2002-03-21
US6400147B1 (en) 2002-06-04
CN1245640C (zh) 2006-03-15
ITMI992312A1 (it) 2001-05-04
CN1560654A (zh) 2005-01-05
CN1250982C (zh) 2006-04-12
ITMI992312A0 (it) 1999-11-04
NL1013496A1 (nl) 2000-05-09
CA2287773A1 (fr) 2000-05-05
CN1260497A (zh) 2000-07-19
NO995395D0 (no) 1999-11-04
CN1560653A (zh) 2005-01-05
GB2346448B (en) 2001-01-31
CN1262849C (zh) 2006-07-05
US20020036503A1 (en) 2002-03-28
AR021095A1 (es) 2002-06-12

Similar Documents

Publication Publication Date Title
CA2287773C (fr) Outil a rmn pour fond de puits comportant un sequenceur d'impulsions programmable
US10295636B2 (en) Integrated circuit for NMR systems
CA2246298C (fr) Methode d'utilisation de frequences multiples pour mesurer la relaxation longitudinale par resonance magnetique nucleaire et sequence de pulsation permettant d'optimiser l'utilisation d'energie
US6163153A (en) Nuclear magnetic resonance pulse sequence for optimizing instrument electrical power usage
US6822444B2 (en) Wideband NQR system using multiple de-coupled RF coils
US6133734A (en) Method and apparatus for evaluating an earth formation using nuclear magnetic resonance techiques
GB2367129A (en) Toroidal receiver for NMR MWD
CA2424034C (fr) Sequence de resonance magnetique nucleaire permettant d'optimiser l'utilisation de l'energie electrique d'un instrument
EP1305653B1 (fr) Outil de resonance magnetique nucleaire a antenne spoiler rf active
RU2337436C2 (ru) Усовершенствованные антенны для каротажа на основе ядерно-магнитного резонанса
WO2002063342A1 (fr) Sequence d'impulsions d'une irm utilisees pour accroitre le rendement d'acquisition
US6597170B1 (en) Optimal excitation pulse shaping for multi-frequency measurements in NMR logging
US5546000A (en) Method for the reduction of radiation damping during signal acqusition in NMR experiments
AU5717799A (en) Downhole NMR tool having a programmable pulse sequencer
AU2003252797A1 (en) An NMR measurement apparatus
MXPA99010135A (en) Downhole nmr tool having a programmable pulse sequencer
US11815482B2 (en) Method and apparatus for high-throughput nuclear magnetic resonance measurements on borehole materials
Peshkovsky et al. Three-dimensional high-inductance birdcage coil for NQR applications
MXPA99009936A (en) Apparatus and method for calculating a spin-es relaxation time distribution
MXPA99009828A (en) Apparatus and method for generating a pu sequence
MXPA99010270A (es) Preacondicionamiento de espines cerca de una region de resonancia magnetica nuclear

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20151102